Granted, the third full week of the NFL preseason is usually the most impactful. It's "dress rehearsal" week—when the starters see their most extensive action before the games begin to count.
Impactful doesn't begin to describe what happened to the AFC South on Saturday. There was an impact, all right—from an asteroid.
Indianapolis Colts quarterback Andrew Luck's stunning announcement that he's retiring from football has turned the league on its head. One of the best young players at the game's most important position for a Super Bowl contender is walking away—just before the season begins.